fix:#25 added tests and schedule updates

backend/service/room/roomService.go

@@ -74,6 +74,7 @@ func GetFreeRooms(app *pocketbase.PocketBase, from time.Time, to time.Time) ([]s
 	return freeRooms, nil
 }
 
+// Remove all rooms from the list that have events in the given time range
 func removeRoomsThatHaveEvents(rooms []string, schedule []model.Event) []string {
 	var freeRooms []string
 	for _, room := range rooms {
@@ -84,6 +85,7 @@ func removeRoomsThatHaveEvents(rooms []string, schedule []model.Event) []string
 	return freeRooms
 }
 
+// Check if a room is in the schedule
 func isRoomInSchedule(room string, schedule []model.Event) bool {
 	for _, event := range schedule {
 		if event.Course != "Sport" {